Buying from a private seller is the cheapest way of getting a used car. But you do have to be careful.

First, insist on meeting at the seller’s address so you can check that the car’s V5C logbook matches that address, and look for proof that the seller does actually live there. If your instinct tells you there is something wrong, don’t take the risk.

If everything seems legitimate, the next task is to look carefully at the paperwork. Check the V5C again to make sure it hasn't been tampered with. And bring along the V5C for your current car to compare.

Next, check that the vehicle identification number (VIN) on the paperwork matches the VIN plates on the car. These will be at the base of the windscreen on the passenger’s side, in the engine compartment, and somewhere on the body. The exact locations vary from model to model, so check where to look before you go. And if any of the plates have been interfered with, walk away.

If you're still happy, and the car has had more than one previous owner, then it is worth trying to get in touch with as many of them as possible to check the car's history.

Finally, a service history is worth having, but these are relatively easy to fake, so it is better if it is backed up by receipts from the garage where the work was done. And also ask to see receipts for any major work.